New to Manjaro, love the liveboot USB of 21.0 KDE Plasma, having an issue installing to a MicroUSB in a USB Adapter from the livebootUSB

Support
2

You want to install the system on a microSD adapter, to be able to use the microSD adapter on different computers to boot from? I’m not sure you can do that.

Quick forum search: Installing Manjaro to External HDD